Just to confirm, this gun has an adjustable carbine stock, correct?
If so and with you saying you run hotter ammo, then I’d say a heavier buffer could be beneficial. In the past I’ve skipped the H3 and used a 9mm buffer (which is the heaviest carbine buffer) for some oddball calibers that were higher pressure.
But it could be as simple as an ejector spring that needs trimming.
When you inspected your fired brass, did you notice any pulled rims or shiny marks from the extractor? The only thing that requires attention if a gun is ejecting at 2:00 is if it is pulling the case out before it has fully dropped pressure and released its hold on the chamber wall.
